This puree is used as a garnish for chef Michael Anthony's Celery Root Soup with Brussels Sprouts and Chestnuts.Photo credit: Ellen Silverman
Preheat oven to 375 degrees. Using a small sharp knife or a chestnut knife, carve an "X" in the flat side of each chestnut. Place chestnuts in an even layer, "X" side-down on a baking sheet. Transfer to oven and roast until opened, 10 to 12 minutes. Peel immediately, using a towel if chestnuts are too hot to touch; coarsely chop.
Heat olive oil in a medium saucepan over medium heat. Add shallots and garlic and cook, stirring, until soft and translucent. Add chestnuts and cook for about 1 minute. Add vegetable stock; bring to a simmer and cook for 30 minutes.
Add molasses, maple syrup, and roasted garlic. Bring to a simmer and continue cooking until chestnuts are soft, about 30 minutes more. Working in batches, carefully transfer to the jar of a blender; blend until smooth.
SourceThe Martha Stewart Show, November 2009